<template>
  <div class="login-container">
    <el-form class="login-form" autoComplete="on" :model="loginForm" :rules="loginRules" ref="loginForm" label-position="left">
      <h3 class="title">后台管理系统</h3>
      <el-form-item prop="username">
        <span class="svg-container svg-container_login">
          <svg-icon icon-class="user" />
        </span>
        <el-input name="username" type="text" v-model="loginForm.username" autoComplete="on" placeholder="username" />
      </el-form-item>
      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password"></svg-icon>
        </span>
        <el-input name="password" :type="pwdType" @keyup.enter.native="handleLogin" v-model="loginForm.password" autoComplete="on"
          placeholder="password"></el-input>
          <span class="show-pwd" @click="showPwd"><svg-icon :icon-class="pwdIco" /></span>
      </el-form-item>

      <el-form-item prop="code">
        <span class="svg-container">
          <svg-icon icon-class="password"></svg-icon>
        </span>
        <el-input v-model="loginForm.code"
                  placeholder="请输入右侧验证码">
        </el-input>
        <div class="code" @click="refreshCode">
          <s-identify :identifyCode="identifyCode" :contentHeight="identifyHeigh" :contentWidth="contentWidth"></s-identify>
        </div>
      </el-form-item>

      <div style="margin-top: 40px;">
        <el-button type="primary" style="width:100%;" :loading="loading" @click.native.prevent="handleLogin">
          登 录
        </el-button>
        <el-button type="text" style="width:100%; margin-left: 0; margin-top: 15px;" @click.native.prevent="forgetpwd">找回密码</el-button>
      </div>

    </el-form>
  </div>
</template>

<script>
import { isvalidUsername } from '@/utils/validate'
import SIdentify from '@/components/identify/identify.vue'

export default {
  name: 'login',
  components:{
    SIdentify
  },
  data() {
    const validateUsername = (rule, value, callback) => {
      if (isvalidUsername(value) || value === '') {
        callback(new Error('请输入正确的用户名'))
      } else {
        callback()
      }
    }
    const validatePass = (rule, value, callback) => {
      if (value.length < 5) {
        callback(new Error('密码不能小于5位'))
      } else {
        callback()
      }
    }
    const validateCode = (rule, value, callback) => {
      if (value != this.identifyCode) {
        callback(new Error('验证码不正确！'))
      } else {
        callback()
      }
    }
    return {
      loginForm: {
        username: '',
        password: '',
        code:'',
      },
      loginRules: {
        username: [{ required: true, trigger: 'blur', validator: validateUsername }],
        password: [{ required: true, trigger: 'blur', validator: validatePass }],
        code: [{required: true, trigger: 'blur', validator: validateCode}]
      },
      loading: false,
      pwdType: 'password',
      pwdIco:'eye',
      identifyCodes: "1234567890",
      identifyCode: "", //4位数验证码
      identifyHeigh: 52,
      contentWidth: 160,
    }
  },
  mounted(){
    this.refreshCode();
  },
  methods: {
    showPwd() {
      if (this.pwdType === 'password') {
        this.pwdType = '';
        this.pwdIco = 'eye-o';
      } else {
        this.pwdType = 'password';
        this.pwdIco = 'eye';
      }
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true
          this.$store.dispatch('Login', this.loginForm).then(() => {
            this.loading = false
            this.$router.push({ path: '/' })
          }).catch(() => {
            this.loading = false
          })
        } else {
          this.refreshCode();
          console.log('error submit!!')
          return false
        }
      })
    },
    forgetpwd(){
      this.$router.push({path: '/forgetpwd' });
    },
    randomNum(min, max) {
      return Math.floor(Math.random() * (max - min) + min);
    },
    refreshCode() {
      this.identifyCode = "";
      this.makeCode(this.identifyCodes, 4);
    },
    makeCode(o, l) {
      for (let i = 0; i < l; i++) {
        this.identifyCode += this.identifyCodes[
          this.randomNum(0, this.identifyCodes.length)
          ];
      }
    },
  }
}
</script>

<style rel="stylesheet/scss" lang="scss">
$bg:#2d3a4b;
$light_gray:#eee;

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;
    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      &:-webkit-autofill {
        -webkit-box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: #fff !important;
      }
    }
  }
  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}


</style>

<style rel="stylesheet/scss" lang="scss" scoped>
$bg:#2d3a4b;
$dark_gray:#889aa4;
$light_gray:#eee;
.login-container {
  position: fixed;
  height: 100%;
  width: 100%;
  background-color: $bg;
  .login-form {
    position: absolute;
    left: 0;
    right: 0;
    width: 520px;
    padding: 35px 35px 15px 35px;
    margin: 120px auto;
  }
  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;
    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }
  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
    &_login {
      font-size: 20px;
    }
  }
  .title {
    font-size: 26px;
    font-weight: 400;
    color: $light_gray;
    margin: 0px auto 40px auto;
    text-align: center;
    font-weight: bold;
  }
  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
  .code {
    width: 160px;
    height: 52px;
    position: absolute;
    right: 0;
    top: 0;
  }
}


</style>
